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    • Journal of Range Management, Volume 54 (2001)
    • Journal of Range Management, Volume 54, Number 4 (July 2001)
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    Dietary structural types of polygastric herbivores at different environments and seasons

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    Author
    Pelliza, A.
    Willems, P.
    Manacorda, M.
    Issue Date
    2001-07-01
    Keywords
    Lama guanicoe
    feces composition
    pastures
    selective grazing
    species differences
    vegetation
    feeds
    digestibility
    sheep
    goats
    cattle
    seasonal variation
    Argentina
    botanical composition
    forage
    diet botanical composition
    conceptualization
    forage classes
    microhistological analysis
    multivariate analysis
    similarity of diets
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    Citation
    Pelliza, A., Willems, P., & Manacorda, M. (2001). Dietary structural types of polygastric herbivores at different environments and seasons. Journal of Range Management, 54(4), 330-337.
    Publisher
    Society for Range Management
    Journal
    Journal of Range Management
    URI
    http://hdl.handle.net/10150/643877
    DOI
    10.2307/4003100
    10.2458/azu_jrm_v54i4_pelliza
    Additional Links
    https://rangelands.org/
    Abstract
    A classification of dietary structural types that represents different arrangements of forage classes is proposed. It may be especially useful for interpreting and comparing herbivore diets from different environments. As an example, a data set with the botanical composition of 55 pooled fecal samples determined by microhistological analysis was analyzed. These samples came from 4 species of range herbivores (cattle, sheep, goat, and guanaco -Lama guanicoe-), from 9 different environments of Northern Patagonia (Argentina) during 3 seasons. Based on plant characteristics related with the capacity of the animals to eat and digest each plant and with the occasional or permanent presence of them in the vegetation, the information was grouped into 5 forage classes: woody plants, perennial grasses, annual grasses, grasslikes, and forbs. A principal component analysis of the grouped data was conducted. The graphic representations evidenced the gradual changes in the structure of the data. Later, working over the subspace defined by the 3 first principal component axes, a hierarchical classification was performed that resulted in 9 dietary structural types. These types represented variation that resulted from the interaction of pasture differences, species of herbivore and season. This concept is an abstraction developed from the experience, to extend its utility beyond the particular cases.
    Type
    text
    Article
    Language
    en
    ISSN
    0022-409X
    ae974a485f413a2113503eed53cd6c53
    10.2307/4003100
    Scopus Count
    Collections
    Journal of Range Management, Volume 54, Number 4 (July 2001)

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